﻿using Microsoft.AspNetCore.Builder;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Logging.Abstractions;

namespace System.Web.DevServer
{
    static class LoggerFinder
    {
        public static ILogger GetOrCreateLogger(IApplicationBuilder appBuilder, string logCategoryName)
        {
            // If the DI system gives us a logger, use it. Otherwise, set up a default one
            var loggerFactory = appBuilder.ApplicationServices.GetService<ILoggerFactory>();
            var logger = loggerFactory?.CreateLogger(logCategoryName) ?? NullLogger.Instance;
            return logger;
        }
    }
}
